Pressure-controlling valve for tire-pumps.



J. DBSMUND.

PRESSURE CONTROLLING VALVE FOR TIRE PUMPS.

APPLICATION FILED MAY 17, 1906,

Patented JM 12. i909.

nor.'

UNITED stri-1 Aiiiiicivr OFFICE.

JOHN DESMOND, 'OAF CHICAGO, ILLINOIS, ASSIGNOR TO ARTIZAN BRASS-COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION.

massuaaoonraonmnc View 4rca rma-rms.

No. teasers.`

with air un er pressure of a certain desired amount.

The invention seeks to provide a simple form of valve which may be used with any suitable pump and which may be readily set to relieve any excess pressure when the pressure inthe tire has been raised tothe desiredextent by the operation of the pump.

A further object of the invention is to provide a pressure relief or controlling valve which will act ris an audible signal to notify the operator when the desired pressure in the tire has been reached.

With these and other objects in view tlie invention consists in the features of con.

struction, combinations and arrangements of parts hereinafter set forth, illustrated in. the accompanying drawing and more articularly pointed out in the appended c aims.

ln'the drawings, Figure 1 is a sectional view of the pump shown attachedto a tire with the improved controlling valve applied thereto. Fig. 2 is anenlarged view in section oiV the liinyiroved valve.

are detail sections on lines 3 3 and 4 4 res ectively of Fig. 2.

with'an'y usual or suitable form of pump; that shown in the drawings comprises a tubularfbody portion' or cylinder 1() threaded at its ends inte heads 11' and 12. A cu ped piston 13 of leather or other suitable yielding material, is cal'riedlupon the lower end of a piston rod 15 that extends through the upper eed 11 and `is provided with an operating handle 16. ir is drawn` into the ypuin through an opening 17 in the upper head 17,1 and is forced oiitt rbnglithe discharge as;v

6o sage 1.8efirtendiiis` `tiirouh a boss., or' o set Dertien 159 of lli-relisted 12.; and @brevet Aanu Lriglit nip' le 2 0 Voi the oii'iset portiony 19. The nwer hea 12l is usually provided with a suitable` foot-p'iece (pot shown).

t@ one @initiates/exime tube 21a/is exea a) Specification o1 Letters Patent.

Application lsd May 17, 1906. Bei-tal No. 817,828.

Figs. 3 and flY heimproved 'val'vemay lie employed Patented Jan. 12, 1909.

the nipple so as to be in communication with the discharge passave 18. The cuter end of the tube is providedwitli an elbow nipple -23` having a coupling sleeve 24 by which it may be attached to the tire nipple 25. The elbow nipple 23 is preferably provided with an aid justable pin 26 which is arranged to engage and hold open the spring-held nipple valve 27.

Part of the dischargev passage 18 Within the outer end of the boss or odset portion 19 on the head 12, is enlarged to form a chamber lfor a check valve 28. A ball check valve is preferably employed and is held to its seat by a coiled cushion spring 29. The check valve 28 and Vits spring could be held in place hy a plug threaded into the outer end of the passage'or bore through the oflset ortio'n 19, but the improved ressure control ing' valve ma be convenient y mounted' at this point an for this purpose, the casing of thevalve is provided with a nipple 30 that is threaded into the outer end o the offset portion 19 and serves to hold the spring 29v and check valve 28 in osition.

In tilieforni shown, the casing of the pressure controlling or relief valve comprises Va lower elbow section 31 and an upperfcyliii'- drical section 32; 'The nipple 30 is on the lower casing section and is preferably suported on the pump as previously described.

hislower section` isprovided with an angular relief port 33 extending therethroughand communicating with the dischar efpas'sage 18 of the pump ata point beyonl y the 'check valve` 28.' The usper section of the valve casing fits over an is threaded upon the'upfper end of thev lower c'asn section 31 arid abuts' against a lip or shou derl 34 thereon. The lower casing section at the end ,of the re lief port or passa e is provided with a 'conical valve scatan just above the seat with an annular recess 37 that is larger in diameter than the valve seat. The conical disk valve 38 fits the seat 36 and is provided With a de pending uide portion 39 of the usual trian'- 10o geler u'ft ine, as indicated in Fi 4, that fits within the upri lit portion 0i t e relief port or passage 33.` gfhevalve is also provideden its .ipper .end `with* an enlarged shoulder` or llange Lil).,arranged'vcithin the annular recess 105 32H11 thelowervsection nl the; val ve, c sin 5.o, Flange'or shoulder 40'is slightly siiial erin i diameter than the recess and is s0 mounted onI tlievalvethat, when the latter is seated,

the lower face of theiiange or shoulder@ is, 111e spaced somewhat apart from the bottom of t e recess 37.

The valve and valve guide are provided with a central socket or bore 41 extending` 43 extends about the upper end of the stem.

42 and engages a' conical Harige or .abutment 44 on the stem to yieldingly hold the valve to its seat. j

The upper orton of thefup r casing section 32 is slig itly reduced'an threaded, as shown in Fig. 2, and a sleeve 45 4sets over the casin The up er portion of] the Abore oi' this s eeve is slig rtl reduced and vthreaded to engage the threa ed .portion of thecasing section 32. the thimble fits the smooth cylindrical portion of the casing below the threaded portionl thereof. This sleeve engages the upper end of the cushion spring 43 so that the ressure exerted thereby may be'easily regu ated by screwing the sleeve up and down on the valve casing. By adjusting the sleeve the valve may be set so that it will lift from its seat and relieve the pressureioii the tire lwhen such pressure is raisedto the desired amount.

The upper ortionof the outer face of the sleeve is pre erably knurled, as shown, .so that 'it may be readily ad'usted.V For Aconvenie'nce in determining t e amount of the adjustment of the sleeve and to lock it in position in such'adusted position, its lower portion is provide with a number of holes2 46 arranged in a spiral around the same and a. leaf spring 47 secured at its lower end by a.

screw 48 to a Hattenedface on the lower cas ing section 31 is' provided at its-upper end with a pointed teat 49. arranged to en age the openings 46 as the thiinble is screws up and down on the valve casing. The holes 46 are marked with a suitable scale to aid in deter'- is turned or swagcd inwardly 'to mining the proper adjustment vot-thesleeve.

'lhe upper end of thesleev'e lis i'ovided with discharge openingsA 50 andwit i acentral upwardlyprojectin guidel throu li which the upper end of t e stem 42 exten s.

The upper portion of the guide 51 is slightly below theeiil'a'rged threadedportion .0f the guide. 51 softhat the cap-*cannot 'become de- The lower portion of, the bore of 'Tl Y `wheri the sleeve is adjusted it is locked in adm slip" 53' 'i the s seva 5i uit.

tached from nie sleeve. It is free however to be screwed up and down on the guide into and out of engagement with the end of ythe stem but is positively held thereon so that it cannot be lost.

Automobile tires as usually constructed, are adapted to be used with a certain definite pressure varyin from 80 to 120 lbs. with diferent tires. or proper operation and to prevent the tire from cutting on the rim of the wheel, the air in the tire should be maintained at a certain definite ressu re for which the tire is adapted, but this pressure should not b e exceeded for otherwise, the tire con- -structionwould be vsubmitted to an undue It is'thercfore quite i and improper strain. important that the tire should be iilled with air at a certain definite pressure, which pressure however should vnot be exceeded. In filling the tires with the pump rovided with the improved controlling or re iei` valve, the sleeve 45 thereof is adjusted on the valve casing in accordance with the desired pressure. iis may be easily'and quickly perfected and Athe relief valve'.

As soon as the valve 38 is lifted slightly from its seat air escapes into the space in the recess 37 be ow the-flange or shoulder4() of the valve so that the area on the under side of the valve which is exposed to the air pressure is suddenly increased andthe valve is quickly lifted. As soon as the flange 40 is raised out of the recess 37, the pressure on the valve issli'ghtly relieved and it tends to close. This operation is then y repeated and bysucli action, .the valve is very rapidly vibrated so thatnithe air escapes through it with 'a burring'or whistling sound. The relief'valve thus `iorrns' an audible signal to,no tify the operator Awhen the desired limit of pressure has been reached.

To insure that the valve will not lift from its seat until the air in the tirehas reached the desired limit, the relierl port 33 of the valve ispreferably Aprovided with a reduced or choked inlet 33', which is 4smaller than the passage through the nipples 23 and 25 or any Aother portion ofthe passage between the choked, the valvei would hc lifted from its; csircd4 limit of pressure 11s.

ssa terme the; d

When 'such a condition ap Z'is screwed down on isv su'v""'ec'ted..t i K engagement with thestaih 4.2 ment-.on its v The operatonaf-tel pumpe justing (soY ' tires having ing up the tire, will loosen the cap 52 and, if

eration of the relief valve, as described', and

then, by loosening the ca to permit the es-4 cape of the excess air in t ie tire through the relief valve. The improved device vmay thus be used Vto insure the pumping up of the tires to the desired definite pressure under varying conditions.

'It is obvious that numerous changes may .be made in the details ietf structure Without departure from the essentials ofthe invention. L'

Having described rnyihvention, what I claim as new and desire to secure by Letters Pat-ent is:-

1. The combination with an air'pum for a discharge passage,V a c eck valve in said discharge assage and a ipe communicating therewit having a coup 4in on -its end for engaging the'tire nipple, sai coupling having means for` holding the nipple valve open, of a relief' valve ,casing open to the' air and having a relief` port communicating with the discharge passage from said pum intermediate said check valve and said coup `ng and provided with a valve seat, a relief valve on said seat, a cushion spring for yieldingly holding said relief valve on` its seat', means for adjusting the pressure of said puinips, cornprisiig relie port provi ed with a valve seat, a i05 spring, and means independent of said'sprin for throwing said relief valve into and out ci operation, substantially as described. 2. The combinationwith an aii` pum for :tires having a discharge passage, a `c eck valve in said passage and a pipe communicating therewith having a coupling 'on its end for engaging the tire nipple, said coupling" having means for holding the nipple valve open, of a relief valve casing, open to the air and having a relief port communicating with the discharge assage from said pump intel'-4 mediate said c eck valve and said'couplng, said vcasing having a valve seat, a relief'valve on said scat, a cushion spring for yielding] holding said valve on its seat, means for aci the pressuraofsaid spring, and adustab e means independent of'said spring. or'positively holding s'aid valve onrits seat,. substantially as described; y 3Q AThe.,combination with an air-'pum for tires f ha a discharge passage',l a c eck valvein 'said dischargel lissage" and av ipe communicating therewit having a'coup 'n on its end for engagingvthe tire nipple, sai coupling having means for holding the nipple `cushion sprin y yieldingly hol ing the same to its. seat, aV

valve open, ci a valve casing having a relief port communicating with the disc-barre pasl sa fc from said ump intermediate Sai check va ve and coup ing and provided with avalvc seat, a valve thereon, a stem for said valve, 'l0

a cushion spring about said stein for yieldingly holding the valve to its seat, a sleeve through which said stem extends adjustably threa ed on said valve casing and engaging the outer end of said'spring, and a cap75 threaded o n said sleeve for enga l'ing said stem'and positively holding said vive to its seat, substantially as described. I

4'. A pressure regulating valve for tire puin s, comprising a valve casing having a s0 relie port provided with a contracted inlet and a valve seat, a valve on said seat, a stern for said valve, la cushion spring surrounding said stein for yieldngly holding the same to its seat,V a regulating sleeve loosely iittin about said stem e aging the outer end o )aid s ring and fitting over and adjustably threa ed on said valve casing to re ulate the pressure of said spring, substantie ly as described,

5. A pressure regulating valve for tire pumps, comprisin a valve casing having a relie port provi ed with a valve seat, a valve on said seat, a stern for said valve, a cushion sprin yieldingl hol ing the sameto its seat,v an adjusts. e part e agin the outerendol: saidspring to reguatevtlgiepressure exerted thereby and an adjustable part for engaging the outer endof said stemto hold said valve positively on its seat, substantially as described.

6. A pressure regulating valve for4 tire a valve casing having a valve on said seat, a stem for s aid valve,='a

surrounding said stem forv sleevesetting 'over and adjustably threaded on said-valvecasing and engaging the outer endfof said spring and a cap adjustably threaded' on sid sleeve for enga i the outer end of s idvstern to hold said valve positivelytoits seat, substantially as de-' scribedf 1' l 7. 'A pressure regulating Vvalve for tire umps, com rising a cylihdrical valve casing aving a re ief port extending through its lowerportion, lsaid casing having a conical valve seat at the upper end of said relief portl and anenlar'ged recess .in the ho Jf'of'the'- valve casingmbcve and about sai seat, a conical valve on said seat having a fiange or shoulder arranged within said recess, an upwardly 'exten ing stein for said valve,` Aa sleeve settin over ,and adustably threaded upon said va ve casing an having4 an' opening in its endsthrougliwliich said valve stem extends, and 'a s ring, forholding said valve toV its seat, coile about said steiathe end of surrounding said stern. for

extends, substantiallyr as described.

' yieldingly holdin said sleeve engaging the end of said s ring to regulate the pressure thereof, as sais sleeve is adjusted upon said valve casing.

8. A pressure regulating valve for tire pumps, comprising a cylindrical valve casing ormed of upper and lower sections screwthreaded together, said lower casing section having a rehcidport with a conical valve seat at its upper en and an enlarged recess about and above the valve seat, a conical valve on said seat having an enlarged annular shoulder or flange arranged within said recess, a spring coiledabout said stem for holding said valve to its seat and a part adjustably threaded to said upper casing section ar. ranged to engage the upper end of said spring to regulate the pressure thereohsaid'part having an opening through which said stein 9. A pressure regulating valve for tire pum s feomprisine a valve casing having a relie port rovided with a, valve seat, a valve on said seat, a stem for said valve, a cushion spring surrounding said stem for lich said 4steril loosely exand adjustably threaded and engaging the end of ate the pressure exerted .said sleeve in sleeve through w tends fitting over on said valve casi said spring to regu thereby and means for locki adjusted position, substantial y as described.

10. A pressure regulating valve for tire puin s comprising a valve easinghaving a relie port provided with a valve seat, a valve on said seat, a stein for said valve, a cushion spring surrounding said stemfor yieldingl holding the valve to its seat, a` sleeve throng i which said stern loosely extends fitting over and adjustably threaded on said valve casing and engaging Vthe end of said spring toregulate the pressure eerted. thereby and a combined scale ,and lock for said regulating sleeve comprising a spring catch fixed to the valve casing and having a pointed ofl'set arranged to engage w'ith any one of a series of holes' arranged in the spiral in the lower portion of said'sleev'e, substantially* as described.

11, A pressure .regulating valve for tire pumps comprising a valve cash? having a relief portv provided with a va ve seat, va

Vvalve on said seat, a stem for said valve, a cushion springi yeldingly hol i surrounding said stem for sleeve fitting over and adjustably thre 4ed ion'sai endo "l valve casing and engaging thefouter fsaids ring, 'said sleeve having a guide ,ongitsgend tiroug-h which said stem loosely extendsgand a cap'adiustabiy threaded upon the 'enlarged outer end of saidguide for 'engaging the outer end of said stem .to hold the valve againstv riiovenient on its seat, said .'cap

anzinturricd lip on its Vlower end be- `{erfilarged,V v l preventing the displacement thereof, subst antially described.

the valve to its seat, a4

ng said valve to its seat a'- portion of said 'guide forA 12. A- pressure regulating valve for tire pumps comprising a lower easing section valve seat adjacent its u per end, a conical valve-engaging said seat iaving a depending uide'fitting in said relief port, said valve iaving a central bore or socket a valve stem the lower end of which loosely lits in the bore or socket of said valve, a cushion spring surrounding said stem and engaging a flange or shoulder thereon, an upper casin section threaded on said lower section an a sleeve throu li which said valve stem extends adjustab y threaded on said upper casin sec- -tion and engagin the upper end o said spring, substantia y as described.

aving a relief port provided with a conical valve seat adjacent its upper end, a conical valve engaging said seat and having `a de- 'pcndi guide iittinginsaid relief port,A said valve airing4 a4 central ore yor socket, a valve stem t e lower end of which loosely fits in the bore or socket of said valve, a cushion spring Vsurrounding said stem and eng-aging a flange orshoulder thereon 'an upper casing section threaded on said ower section, a sleeve through which said valve stem extends adjustably threaded on the u per casin'g section and a spring ,catch on t e valve casing arranged to engage one of a spiral series of holes .in the lower end of said sleeve Y for lookin the latterin adjusted position,

substantia ly as described 14. The combination with a hand operated air puin for tires, having a discharge passage, a c ieck valve in said discharge passage and a pipe communicating with said dischar e passage and having a coupling in its end or vengaging the tire nipple, of a valve casing openin to the air and having a relief port communicating with the discharge passage of said ump intermediate said check valve and said cou ling, saidvalve casing being provided Wit a valve seat, a. valve thereon, a spring for ieldingly holding said ,valve on its' seat an means for regulating the pressure exerted by saidspring, subst'an` tiallj,T as described. w 15. The combination Witha hand operated `air pump for tires, having a discharge passage provided with a chec ple and a pipe having a coupling on one end foreiigaging, the tire nipple and connected at its other end to the nipple of saiddischarge passage, of a valve casing opening to the air the discliar assage of said pump intermedi ate said valve and the nipple thereof, said valve casing saidvalve, a cushions. stein for yieldingly ho i Y seat, ,and a 'sleeve adjustably threaded 13. A pressure regulating valve for tire pumps comprising a lower casing sectionA rfvalve and a niphavii'igV a valve seat about vsaid relief portna valve.- thereon, aflstem for Y ,ring surroundings-aid ding said valve to itsupon aving a relief port provided with a conical and having .a relief portcornmunieating with .said s eeve having an opening throu h 'which and a -pipe communicating with said `said valve stem extends, substantia y as described.

16. The combination with a hand operated air pum for tires, havin a discharge passage, ac eck valve in sai discharge passge 1schai e passage and having a coupling on' its end or engaging the tire ni ple', of a relief valve casingmounted on t e pump, said valve casing having a relief port communieating with the dischar e assage of said pump intermediate said c ec valve and said pipe and said casi having a valve seat about said ort, a va ve on said seat, a stern for said v ve, a sleeve surrounding and ad- 'ustably threaded upon said valve casing and avi-ng an end portion adapted to Aengage said spring to regulate the pressure thereof, said sleeve having a guide opening torecei-ve the end ol said valve stem and a scale coperating with said sleeve to'indicate the point of relief of said valve, substantially as described.

17. A pressure regulating valve for tire A pumps, comprising a lower casing section Vlower casing section havi and an upper cylindrical casing section threaded to said lower casing section, said a relief port exa conical valve tending therethrough an seat at its lower end, a conical value on said seat having' a depending guide, avalve stem extending through said upper casing section the lower end of which engages a centra socket in said valve, a"cushion spring surrounding said stem and engaging aange orshoulder thereon, a cylindrical sleeve extending about and adjustably threaded upon said upper casing section and having an end portion engaging the upper end of said s ring to regulate the pressure thereof, asiel) sleeve having an opening to receive and guido the upper and o said valve stem and e scalo rooperating with said slcc-rc to indicato ilio point of relief of said vulve, subf-itnntially as described.

18. A pressure relief vali/ for tire pumps, comprising a valve casing formed of a lower section and an upper, cylindrical section screw-threaded to said lower casing section,

saidlower casing section having a relief port extending therethrough and a conical valve seat at its upper end, a conical valve on said seat having a depending guide, a valve stem extending through said upper casing section; the lower end o which. stem engages a een tral socket in said. valve, a. spring coiled about said stem and engaging a flange or shoulder thereon, said up er casing section having a reduced; oxteriory threaded upper and, a'

sleeveftting over and having internal threads to en vage the exteriorly threaded portion of sai u per casing section, the lower portion of said slpeevc having an enlarged, unthreaded bore to fit over the main body of said upper casingsection and said sleeve having an end portion for engaging the upper end of' said spring to adjust t e pressure thereof, and an to receive and guide the upper end ,opemrg o sai stem, and a scale cooperating with said sleeve to indicate the point of relief of said valve, substantially as described.

JOHN IHSMOND.

Witnesses:

Llaman Purmeren, KATHERINE Gaumen. 

